CURLOPT_SOCKS5_GSSAPI_NEC(3) Library Functions Manual NAME CURLOPT_SOCKS5_GSSAPI_NEC - SOCKS proxy GSSAPI negotiation protection SYNOPSIS #include CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SOCKS5_GSSAPI_NEC, long nec); DESCRIPTION Pass a long set to 1 to enable or 0 to disable. As part of the GSSAPI negotiation a protection mode is negotiated. The RFC 1961 says in section 4.3/4.4 it should be protected, but the NEC reference implementation does not. If enabled, this option allows the unprotected exchange of the protection mode negotiation. DEFAULT ? PROTOCOLS All EXAMPLE int main(void) { CURL *curl = curl_easy_init(); if(curl) { CURLcode res; curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/"); curl_easy_setopt(curl, CURLOPT_PROXY, "socks5://proxy"); curl_easy_setopt(curl, CURLOPT_SOCKS5_GSSAPI_NEC, 1L); res = curl_easy_perform(curl); curl_easy_cleanup(curl); } } AVAILABILITY Added in 7.19.4 RETURN VALUE Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not. SEE ALSO CURLOPT_PROXY(3), CURLOPT_SOCKS5_GSSAPI_SERVICE(3) libcurl April 26 2024 CURLOPT_SOCKS5_GSSAPI_NEC(3)